Printing telegraph apparatus



Aug. 26, 1941. R ZENNER 2,253,546

PRINTING TELEGRAPH APPARATUS Filed Oct. 12, 1939 2 INVENTOR. 2 RAYMOND E. ZENNER ATTORNEY.

Patented file-1g. 526, 1941 ram'rmo TELEGRAPH APPARATUS Raymond E. Zenner, Broolrfield, 11]., assignor to Teletype Corporation, Chicago, 111., a corporation of Delaware Application October 12, 1939, Serial No. 299,074

9 Claims.

The present invention relates to printing telegraph apparatus and more particularly to improvements in tabulating mechanisms therefor.

The principal object of this invention is to provide an eflicient and dependable tabulating mechanism selectively responsive to code combinations of signaling impulses for controlling tabulation recording.

A feature of the invention resides in the provision of means for delaying the operation of the tabulator function lever to assure invariable performance of the tabulating function. To this end the tabulation function lever is delayed in movement until after the function of spacing has been begun by a sole device which invariably initiates all spacing movements whether after printing, word spacing, or tabulation spacing.

The above and other objects of the invention are accomplished by the provision in a printing telegraph apparatus, of the type disclosed in U. S. Patent 1,904,164, of a tubulator bar which extends across the front of the machine and is carried by brackets mounted in the typing unit and capable of swinging toward and away from the type carriage. The tabulator bar carries a number of adjustable tabulation stop members which determine the positions to which the type carriage is automatically spaced through a plurality of character space distances upon the reception of a tabulator code signal combination. The spacing mechanism of the printing apparatus comprises a multi-toothed spacing escapement wheel adapted to co-operate with a pair of pawls which are actuated by the printing bail to function as an escapement mechanism in such manner that the spacin wheel is permitted under normal operating conditions to escape one tooth at a time, and thereby to rotate a spacing worm gear through a corresponding angle.

According to the aforementioned patent, a series of function levers is provided which are operated selectively in accordance with the setting of a series of selector vanes. In this series of function levers, the present invention contempletes additionally the provision of a tabulating function lever which, when selected, may be drawn forward into the selector vanes under spring tension. The present invention concerns the conformation of the tabulating function lever to govern the timing of the operation thereof, When the tabulating function lever is selected, a rear extension thereof rises and thereby lifts the rear end of a horizontal lever member. When the rear end of this horizontal lever member is raised, it lifts, through suitable linkage, an upper spacing pawl out of engagement with the tooth of a spacing escapement wheel while at the same time the front end of said horizontal member is lowered, permitting the tabulator bar to be moved by its spring toward the type carriage, thereby latching the horizontal member in its operated position. When the upper spacing pawl is thus disengaged, and a lower spacing pawl is in its normal position free of the teeth on the escapement wheel, the spacing motion of the type carriage will proceed continuously until arrested under the control of a tabulation stop member. To bring the carriage to rest after tabulating, the upper space pawl is permitted to drop again into engagement with a tooth on the spacing ratchet. This latter function is effected by the coaction of a cam element assembled to the carriage and one of a plurality of adjustable tabulation stop members carried by the tabulator bar. This cam forces or cams the tabulator bar forward or away from the carriage, against the spring tension, and in so doing permits said horizontal member to be restored to its normal position. This restoration action of the horizontal member permits the upper space pawl again to fall into engagement with a tooth on the spacing wheel, which thereby brings the carriage to rest.

Specifically, to achieve the object of the present invention, a six-unit type bar selector is provided, wherein the sixth code bar is interconnected with the sixth vane of the selector vane assembly (fully disclosed in the aforementioned patent) by a sixth bell crank lever (only five of which were necessary to accomplish the object of the invention disclosed in said patent). The cam surface of the tabulator function lever which cooperates with the function lever bail is so conformed that this function lever is operated late in the forward stroke of the printing ball. The sixth bell crank and sixth code bar are provided to prevent selection of the G" pull bar on upper case G (tabulator signal). Thus, printing of a character is suppressed by preventing selection of a pull bar in the upper case position. Due to the late or delayed operation of the tabulator function lever by reason of the shape of the cam surface thereon, and due to the full stroke of the printing ball, the lower spacing escapement pawl is moved into engagement with the spacing escapement wheel before the upper escapement pawl is disengaged by the tabulator function lever, through the horizontal member and the type carriage is not permitted to move effectively until the lower pawl has been withdrawn by the return stroke of the printing bail. With the mechanism of the present invention, the type carriage invariably comes to rest at the first tabulation stop, irrespective of the starting position, and the operating margins also are independent of the starting position.

A better understanding of the invention may be had from the following description taken in conjunction with the accompanying drawing, Wherein Fig. 1 is a front elevational view of the principal portion of the printing apparatus disclosed in U. S. Patent 1,904,164, showing the application of the tabulator mechanism thereto;

Fig. 2 is a transverse sectional view of the printer taken approximately on line 2-2 of Fig. 1, showing particularly the tabulating function mechanism and the spacing mechanism controlled thereby; and

Fig. 3 is a sectional detail view taken on line 33 of Fig. 1.

In the accompanying drawing, like reference characters indicate similar parts throughout the several views. For a complete understanding of details not disclosed herein, but which form a part of the present invention, reference should be made to U. S. Patent 1,904,164, issued April 18, 1933, to S. Morton et al.

A typing unit, illustrated generally in Fig. 1, includes a primary selecting mechanism represented by a single selector magnet II, which is of the type disclosed in U. S. Patent 1,745,633 issued to S. Morton et al. (fully disclosed in the first mentioned patent), and a secondary selector or selector vane assembly indicated generally as I2. The selector vane assembly I2 controls, through a set of bell cranks I3 (Fig. 1), a corresponding set'of curved code bars l4 carried in a movable type carriage, indicated generally as I5.

It will be noted that there are six vanes 20 in' the selector vane assembly I2, the same as shown in the aforementioned Patent 1,904,164, but according to the present invention, the number of code bars I4 has been increased from five to six to correspond to the number of vanes 20, and, accordingly, six bell cranks I3 serve to interconnect the vanes 20 with the code bars I4 for the purpose hereinafter described. As set forth in Patent 1,904,164, type carriage I5 is movable longitudinally with respect to a stationary platen (not shown) but manifestly the invention is not limited in its application to such apparatus.

Referring particularly to Fig. 2, a motor (not shown) supplies power to a main operating shaft I 6 which carries the spacing mechanism indicated generally as H, as well as the selector cam assembly (not shown) which co-operates with. the selector magnet I I. The spacing mechanism. I1 controls, through gear I8, shaft I9, gear 2I,. and rack 22, the advancement of the type carriage I5, winding as it does so a carriage return spring mechanism, indicated as 30, which restores the carriage to its normal position upon the receipt of a carriage return signal.

Parallel to the main operating shaft I6 is an auxiliary fixed shaft 23 upon which are pivotally carried various mechanisms; for example, printing bail 24, function lever bail 25, and the escapement elements of the spacing mechanism I1. The printing bail 24, which is actuated by a spring I0, at the proper time in the operative cycle, functions to reciprocate a pull bar operating member 26 to cause, through a pull bar 21, the operation of a type bar 28.

arm 35 of the function lever 29.

The selector vanes 20 control a series of function levers, including a tabulating function lever 29. The several function levers are pivoted on a common pivot rod 31 and are aligned within slots in a function lever comb 32. Each function lever has an individual spring 33, tending to rotate it clockwise about pivot 3|, but is restrained by the function lever bail 25 acting through rod 34 on The function lever 29 is provided on its arm 36 with code notches and projections which co-operate with the vanes of the selector vane assembly I2, and is coded to correspond to the tabulator signal.

In Fig. 2 there is shown mounted on the main shaft I5 a sleeve member 31, which comprises, integral therewith, an escapement wheel 38 and a spacing worm 39 meshed with gear I8. Sleeve member 31 is operably connected to' the shaft I6 by means of a friction clutch (not shown), through which it is rotated by main shaft I6, unless blocked by the pawls of the spacing mechanism I1,as will presently appear.

Referring to Fig. 2 again, it will be noted that ratchet 38 is provided with three teeth 4 I, 42, and 43, the successive escapement of which will allow the type carriage I5 to be moved forward one step or character space for each actuation of the printing ball 24. As indicated, the escapement mechanism comprises a pair of pawls or levers 44 and 45 pivotally mounted on shaft 23, and a lever 46 carried by the printing bail 24. Spring 41 normally tends to draw levers 44 and 45 toward each other, since it is common to both levers. Lever 44 is normally urged by spring 41 in a counterclockwise direction to cause its laterally disposed end 48 to engage tooth 4| of wheel 38, thus arresting the rotation of said wheel. Lever 45 is normally held out of engagement with wheel 38, opposing the tension of spring 41 by the intervention of lever 46, whose free end extends into the path of laterally disposed end 49. Lever 46 is mounted adjustably on printing ball 24 by means of pivot 5| and clamping screw 52.

The spacing operation occurs immediately following or subsequent to the printing of a character in the following manner: To print a character, the printing bail 24 oscillates and, in so doing, controls the operation of lever 46. Durin the first portion of the clockwise movement of arm 46, lever 45, under the action of spring 41 also rotates clockwise to bring the laterally disposed end 53 into the path of tooth 42. It is noted that, due to the space indicated at 54 between lever 45 and the laterally disposed end 55 of lever 44, the latter will not be acted upon at first, and end 48 thereof remains in engagement with tooth 4I. However, upon the further clockwise movement of lever 46, the end of arm 55 is encountered and, movement is then imparted to lever 44, effecting the disengagement of end 48 from tooth M and permitting ratcheI 38 to rotate slightly in a clockwise direction under the influence of a friction clutch interconnecting sleeve 31 and shaft I6. This initial motion of wheel 38 is sufficient to allow tooth M to escape the control of end 48 and is limited by the engagement of tooth 42 with laterally disposed end 53 of lever 45, which lever, as was noted, rotated in a clockwise direction under the tension of spring 41. Wheel 38 is, therefore, restrained from rotation by a lever 45 while the character is being printed, after which time printing bail 24 and associated lever 46 rotate in a counterclockwise direction actuated by a printing cam (not shown) carried on shaft I6.

Restraint upon lever 44 by lever 46, through end 55, is thereby removed, permitting lever 44 to rotate in a counterclockwise direction under the influence of spring 41 into the path of oncoming tooth 43 of wheel 38. During this counterclockwise movement of lever 46'and after the aforementioned removal of restraint upon lever 44, lever 45 is used to rotate in a like direction due to the action of lever 48 on laterally disposed end 49, thereby disengaging end 53 of lever 45 from tooth 42 and allowing wheel 39 to resume its rotation until arrested by the engagement of end 48 of lever 44 with tooth 43. It is observed that as a result of the escapement mechanism just described, there is a period of overlap during which ends 48 and 53, due to the space indicated at 54, are positioned concurrently to prevent the escapement of wheel 38, the ends 48 and 53 being otherwise alternately engageable to control the" escapement of wheel 38.

It is obvious that since spacing worm 39 and wheel 38 are integrally connected to sleeve 31, the worm 39 will have normally the same intermittent or step-by-step motion, as was hereinbefore seen to be imparted to wheel 38. Worm 39 is meshed, as previously mentioned, with the worm l8, which is rotatable freely on vertical shaft l9 and is operably connected thereto through the instrumentality of a jaw clutch 56. Worm 39 and gear l8 are so related, according to the present embodiment, that one-third revolution of worm 39 will rotate gear |8 through a distance which, through gear 2| and rack 22, causes the type carriage |5 to be advanced the distance of one character space.

From the foregoing, it will be observed that character spacing occurs automatically with the printing of each character; that is, the spacing function is incorporated into the printing operation. It is well known that there is a code combination allotted to each type bar; but it is possible to employ a code combination, commonly known as the space signal, which is identified with no type bar, but which will, nevertheless, initiate the operation of the printing mechanism, Therefore, the spacing between words is accomplished, when a space signal is received, in exactly the same manner as just described, ex-

' cept that no type bar is operated and, consequently, there is no character printed.

In accordance with the present invention, continuous spacing may be effected upon the receipt of a code combination known as the tabulating signal, the function of which is to condition the operation of the tabulating mechanism. The mechanically operated tabulating arrangement of the present invention comprises a tabulator bar 6|, extending across the front of the printing apparatus, as shown in Fig. 1, which is provided with depending portions 62 and 63, through which bar BI is pivotally mounted on a bracket 64, carried on the printer frame. Thus, tabulator bar 6| is adapted to be swingable toward and away from the type carriage; |5. Bar 6| is also provided with a longitudinal slot 65 extending substantially the entire length of the bar, within which are movable tabulation stop members 66, which are adapted to be clamped to the bar 6| by means of screws 61 and clamps 68 (Fig. 2). As indicated in Fig. 3, these stops members 66 are provided with an inclined or cam portion 69, conformed to produce a quick action upon co-operating with a cam element 1| carried by the type carriage IE to terminate suddenly the tabulating operation.

Tabulator bar 6| is also provided, intermediate the depending portions 62 and 63 (Fig. l) and suitably positioned relative to function lever 29, with another depending portion 12. Attached to and depending from portion 12 is a bar 13, the lower end of which is provided with an aperture 14 having its upper left-hand corner (as viewed in Fig. 2) formed so as to provide a reentrant stepped portion 15. The tabulator bar 6| normally tends to move in a counterclockwise direction, as viewed in Fig. 2, due to the action ofa spring 16 (Fig. 1).

Co-operating with the stepped portion 15 is one arm 11 of a lever 18 pivotally carried at 19 on a bracket 8| screwed to the-function lever comb 32. The extremity of arm 11 is provided with a laterally disposed portion 82 (Fig. 1), which co-operates with the portion 15 of member 13. At the end of arm 83 of lever I8 is carried a vertically extending member '84, the upper end of which is provided with an open-ended slot adapted to engage a pin 85 carried by the escapement lever 44.

Function lever 29 is provided with a horizontal portion 86, so conformed that its extremity 81 engages the lower edge of arm 83 of lever 18 so that, when function lever 29 (upon its selection) is permitted to rotate in a clockwise direction under the action of its spring 33, the end 81 thereof is raised, causing lever 18 to rock in a clockwise direction against the tension of its spring 89. The end 82 of arm 11 is thereby moved downwardly clear of portion 15, permitting spring 16 to urge the tabulator bar 6| inwardly (or toward the left as viewed in Fig. 2) until wall 9| of member 13 engages portion 82.. Adjustable tabulation stops 66 are, therefore, moved inwardly into the path of a cam member 1| (Fig. 3), which is pivoted at 92 on a portion 93 integrally formed on a bar 94, which is comparable to bar 53, shown in Fig. 1 of Patent 1,904,164, and which is employed for retaining the bell crank levers l3 in operable relation to vanes 20. Cam 1|, like bar 94 and bell crank levers I3, is movable with the type carriage l5 for character spacing and normally tends to rotate in a clockwise direction about the pivot 92, due to the action of a spring 95, but its clockwise rotation is limited by the coaction of the stop pin 96, carried thereon, with the end of bar 94. Consequently, upon the rightward movement of type carriage |5 (as viewed in Figs. 1 and 3), cam 1|, due to its limited rotatability in a clockwise direction, will, by its camming action on stop member 66, rock tabulator bar 6| outwardly. Upon the leftward or carriage return movement of type carriage |5, cam 1|, upon striking the series of stop members 96, will be rotated counterclockwise against the action of spring 95, avoiding displacement of the cam portion 69.

Upon the clockwise rotation of lever 18, due to the selection of function lever 29, arm 83, and consequently member 84 carried thereon, will be raised, and in so doing will, through pin 85, lift escapement lever 44 out of engagement with the teeth of the ratchet wheel 38, which, since the lever 45 is (after its oscillation by bail 24) prevented from engaging the teeth of the ratchet 38 due to its being held in its retracted position 'by lever 46, permits the worm gear 39 to make that of normal spacing, so long as the escapement lever 44 is held out of operative engagement, with lever 38, which is maintained in this position due to the engagement of lug 82 with the underside of the step portion 15. Thus, carriage |5 will be moved continuously until cam 1| coacts with one of the series of tabulation stops 66, when, through stop 66, cam II will urge tabulator bar 6| outwardly, or in a clockwise direction as viewed in Fig. 2, to disengage lug 82 from portion l5, whereupon lever 18 will again be rotated in a will have been reciprocated once so that rod 34,

upon the down stroke of ball 25 will permit spring 33 to urge lever 29 into co-operative relation with vanes 20 only long enough to effect the selection thereof and the resulting disengagement of the pawl 44. Following this, rod 34 will cam the function lever 29 away from the vanes 20, where it will be held until the reception of another tabulation code signal.

Normally, upon receipt and execution of the code signals for functional operations, such as shift and bell, it is desirable to execute the operation without effecting spacing. In execution of such operations, spacing is suppressed by limiting the movement of the printing bail 25 and lever arm 46 to a fractional movement (in the manner fully described in Patent 1,904,164) such that the space pawl 44 does not become disengaged from the tooth 4|.

Heretofore, similar operation resulted pursuant to the reception of the tabulator signal; that is, in the execution of the tabulation function in response to the tabulator signal, spacing was suppressed. However, due to operating margins under certain operating conditions consistent and invariably uniform operation of the tabulating mechanism was difficult to obtain.

In a printed page formed with vertical tabtain this effect, provision is made, in existing structures, that a tabulation spacing step shall not be less than three character spaces. Operators of such machines are instructed accordingly, but to assure the attainment of this effect, means is provided which becomes effective in case the operator neglects this instruction. Such instruction is not necessary with the device according to the present invention, with which device, under no circumstances, or conditions, is it possible to operate the tabulating mechanism improperly.

To assure consistent and uniform operation of the tabulating mechanism, the present invention provides means for delaying the selection of the tabulator function lever until the spacing mechanism has operated to a sufficient degree to assure the proper timing of operations between the normal spacing mechanism and the tabulating mechanism. Heretofore, upon the initiation of operation of a printer supplied with a tabulating device, the function lever ball 25 made only a partial stroke, sufficient to permit the function lever to be advanced toward the vanes 20 by its spring 33, and the pawl 53 to be advanced toward the tooth 42 of the wheel 38, the function lever ball 25 being provided" with.- a projection (not shown) over arm 35' of the tabulator function lever 29 so that after the function lever was permitted to move toward the vanes for completing a selection, the function lever ball 25 was blocked in its. further clock-- WlSe movement. However, the movement of the tabulator function lever 29 toward the vanes and its rotation upon its pivot 3| occurred substantially simultaneously with the advancement of end 53 of pawl 45 toward the tooth 42 of the ratchet 38. Since, then, the rotation of the function lever 29 caused, through lever 18, the disengagement of upper space pawl 44 from the tooth 4| the possibility arose that pawl 44 would be disengaged from tooth 4| before end 53 of pawl 45 engaged tooth 42, thus causing the ratchet 38 to escape prematurely, due to a race or marginal condition. All this is obviated by the present invention, wherein the selection of the function lever 29 for tabulation is delayed to assure the engagement of end 53 of pawl 45 with tooth 42 before the disengagement of pawl 44 from tooth 4|.

In accordance with the present invention, the function lever bail 25 is permitted to execute a complete stroke, the projection or lug on the printing bail, formerly provided over function levers for blocking the spacing function or operation, has been removed as regards function lever 29. However, the inner surface I 0| of arm 35 of the tabulator function 'lever 29 is so conformed or contoured as to prevent motion of said function lever until after pawl 45 has engaged tooth 42 of ratchet 38. That is, when the the function lever bail 25 has moved a predetermined distance from the full-line position, shown in Fig. 2, to the dotted line position shown, the end 53 of pawl 45 has moved toward the wheel 38 into the path of tooth '42, during which operation the tabulator function lever 29 has remained quiet. Thereafter, further clockwise movement of function lever bail 25 beyond the dotted line position shown in Fig. 2 will permit function lever 29 to be drawn by its spring 33 into selective relation with the vanes 28, which, as is understood, have been set to assume the tabulator selecting condition. Now, when the function lever 29 is thus permitted to rotate clockwise about the pivot 3|, under the influence of its spring 33, the arm 86 thereof will rotate lever 18 clockwise to effect, through link 84, the disengagement of pawl 44 from the tooth 4|. The wheel 38, however, will not rotate freely at just this instant, because end 53 of pawl 45 obstructs the tooth 42. However, upon the return or counterclockwise stroke of function lever bail 25, pawl 45 will rotate counterclockwise as an incident thereto thus disengaging its end 53 from tooth 42 to permit the continuous rotation of the ratchet 38 and its associated worm gear 39 to accomplish the tabulating operation. It is seen, therefore, that irrespective of the relative positions of the cam II and a tabulation stop 66, tabulation will invariably be initiated in the samemanner, being independent entirely of any marginal operating condition previously alluded to.

In prior devices of the class described, the printing operation was prevented or suppressed pursuant to receipt of the tabulation code signal by blocking the full movement of the printing bail. According to the present invention, printing suppression is effected by preventing the selection and operation of any type bar and permitting full movement of the printing bail. For example, with a five unit code system, any five unit code combination may represent a character (that is, a type bar) and a function; for instance, the tabulation function and the character (31" may be represented by the sam five unit code. Distinction is made between the character selection and tabulation operation or function by introducing a sixth code bar in the group of code bars M, which, when the vanes 20 are set to select the tabulation function lever 29, acts to block or prevent selection of the type bar associated with the tabulation code (which, in the present instance, is the G type bar). Thus, when the lowermost vane 20 is previously set for upper case or shift," the sixth code bar M will be set to block selection of the pull bar 21 associated with the G" type bar, whereupon,

the tabulation function lever 29 will be selected instead. on the other hand, when the lowermost vane 20 is set for lower case or unshift, the sixth code bar I4 will be set to permit selection and operation of the pull bar associated with the G" type bar, and the tabulation function lever 29 will be blocked against selection and the tabulation function will be prevented.

It is seen from the foregoing that an arrangement has been provided for assuring consistent and uniform operation of the tabulating mechanism of a series of printers connected in the same line circuit. that this application is intended to cover not only the specific embodiments disclosed, but also such arrangements or modifications as come within the spirit of the invention or scope of the following claims.

What is claimed is:

1. In a recorder, a platen, type elements, means for effecting relative movement between said platen'and elements normally one character space, means for controlling the relative movement of said platen and type elements through a plurality of character spaces in one continuous movement from one recording position to another recording position, and means for delaying the response of said controlling means to assure its proper op eration.

2. In a recorder, a platen, type elements oper-' ating with said platen for printing and movable normally one character space, means for causing said elements to advance through a plurality of spaces at a time from one recording position to another, means for initiating the operation of said means, and further means for delaying the action of said initiating means to assure the invariably uniform operation of said first recited means.

3. In a recorder, selector mechanism responsive to received code combinations of signalling impulses, a type carriage movable normally one character space for each recording operation, means controlled by said selector mechanism for causing said carriage to advance uninterruptedly through a plurality of spaces at a time from one recording position to another, and means included in said means for delaying its effectiveness to assure invariably the uniform operation of said means.

4. In a recorder, a carriage movable to form character spaces, means to perform functions other than recording, a permutation device mov- It is, of course, understood able with said carriage to determine the character to be recorded, a stationary selector device to control said means and said permutation device, a tabulating device controlled by said means for releasing said carriage for advancement through a plurality of spaces at a time from one recording position to another, and means included in said tabulating device for delaying the release of said. carriage to assure the invariably uniform operation thereof.

5. In a telegraph recorder, a carriage movable to form character spaces, a spacing mechanism therefor normally adapted to control the advancement of said carriage one character space upon each operation thereof, said spacing mecha-- nism comprising a pair of spring biased pawls acting to afford an escapement therefor, permutation co mechanism to control operations other than recording comprising a plurality of function code levers, tabulating mechanism operative in response to the selective operation of a certain one of said levers to effect, through the instrumentality of said lever, the disablement of one of said pair of pawls to release said carriage for advancement continuously through a plurality of spaces at a time, and means for delaying the disablement of said pawl for a predetermined period to assure the invariably uniform effectiveness of said tabulating mechanism.

6. In a recorder, elements movable normally one character space, means for causing said elements to advance through a plurality of spaces at a time from one recording position to another, means for initiating the operation of said means, and cam means contoured for delaying for a predetermined period the action of said initiating means to assure invariably uniform operation of said first recited means.

'7. In a telegraph recorder, a carriage movable to form character spaces, means comprising a multi-toothed disc to effect said spacing movement, a bail movable in a complete cycle for each character spacing operation, detent means mounted in said bail whereby the movement of said bail during each spacing operation causes the escapement of said disc to effectuate, through said first-recited means, the spacing movement of said carriage, permutation code mechanism to control operations other than recording comprising a plurality of function code levers, tabulating mechanism operative in response to the selective operation of a certain one of said levers to disable, through the operation of said lever, said detent means to enable said first-recited means to advance said carriage continuously through a plurality of spaces at a time, and cam means on said certain one of said levers cooperative with said bail to control the operation of said tabulating mechanism, said cam means contoured to delay for a predetermined period the initiation of movement of said carriage for tabulation.

8. In a printing telegraph recorder, a platen, type elements, means for effecting printing from said type elements, character spacing means for causing relative movement between said platen and said type elements under the control of said printing means, means for causing said character spacing means to be operated through a plu rality of character spaces in one continuous movement, and means for precluding the operation of said last-mentioned means until said printing means has attained a predetermined position in its movement.

9. In a printing telegraph recorder, a platen.

type elements, means for eflecting printing i'rom through a plurality of character spaces in one said type elements, spacing means for causing continuous movement, and means for precluding relative movement between said platen and said the operation or said last-mentioned means while type elements held from operating during the said spacing means is held from operating durprinting stroke of said printing means, means for 5 ing the printing stroke of said printing means. causing said spacing means to be operated RAYMOND E. ZENNER.

Patent No. 2,255,5h6. August 26, 19m.

RAmON E. ZENNER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correctionas follows: Page 5, first column, line 8, for the word "used" read --caused--; and that the said Letters Patent shouldbe read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 2nd day of December, A. D. 19M.

Henry Van Arsdale,

(Seal) Acting Commissioner of Patents. 

